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EC number: 233-162-8 | CAS number: 10049-04-4
Storage stability and reactivity towards container material
Administrative data
- Endpoint:
- storage stability and reactivity towards container material
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- documentation insufficient for assessment
- Remarks:
- Data comes from a book dedicated to chlorine dioxide, compiling very numerous literature references. Some experimental details are provided, but the method could not be related to a standard guideline.
Cross-reference
- Reason / purpose for cross-reference:
- reference to other study
Data source
Reference
- Reference Type:
- secondary source
- Title:
- Practical chlorine dioxide
- Author:
- Simpson Greg D.
- Year:
- 2 005
- Bibliographic source:
- Volume I - Foundations
Materials and methods
- Principles of method if other than guideline:
- 1. Litterature review.
2. Flow of gas stream over metals coupons.
Test material
- Reference substance name:
- Chlorine dioxide
- EC Number:
- 233-162-8
- EC Name:
- Chlorine dioxide
- Cas Number:
- 10049-04-4
- Molecular formula:
- ClO2
- IUPAC Name:
- Chlorine Dioxide
Constituent 1
Results and discussion
- Results:
- The appearance of the carbon steel coupon changed rapidly, while other metals showed no visual change. Within two hours, the carbon steel coupon had flash-rusted badly.
Any other information on results incl. tables
Corrosion rate for ClO2 gas on selected metals:
Metal |
Type |
Corrosion rate (mpy) |
N-200 |
Nickel |
0.00 |
C-276 |
Hastalloy |
0.02 |
SS-316 |
Stainless |
0.02 |
SS-304 |
Stainless |
0.03 |
I-600 |
Inconel |
0.06 |
TI-2 |
Titanium |
0.09 |
Tin |
Tin |
0.19 |
Galv |
Galvanized |
0.28 |
CDA-110 |
Brass |
0.64 |
HD Galv |
Galvanized |
1.17 |
CDA-443 |
Admiralty |
1.45 |
Al-1100 |
Aluminum |
6.26 |
C1010 |
Carbon steel |
14.90 |
Al-7075 |
Aluminum |
19.95 |
1 mpy = 0.001 inches per year (25 µm/y)
Applicant's summary and conclusion
- Conclusions:
- These results are inconclusive with regard to Regulation (EC) No.1272/2008 (CLP) criteria.
- Executive summary:
ClO2 is quite corrosive under conditions of low pH, high chloride concentration, high temperature, and high [ClO2]. Of these, the two most important parameters are pH and temperature. The presence of chloride becomes very important if the metal is stainless.
Under low concentrations, such as those encountered in potable water, cooling systems, or sanitation applications, ClO2 is less corrosive than other oxidants; and so in such systems, corrosion due to ClO2 is not generally a consideration.
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